热处理对冷喷涂铁基非晶涂层耐腐蚀性能的影响

doi:10.13251/j.issn.0254-6051.2025.03.043

金属热处理 ›› 2025, Vol. 50 ›› Issue (3): 270-276.DOI: 10.13251/j.issn.0254-6051.2025.03.043

热处理对冷喷涂铁基非晶涂层耐腐蚀性能的影响

张香云, 丁国强, 袁子洲

兰州理工大学材料科学与工程学院, 甘肃兰州 730050

收稿日期:2024-10-27 修回日期:2025-01-21 出版日期:2025-03-25 发布日期:2025-05-14
作者简介:张香云(1986—),女,副教授,博士,主要研究方向为非晶合金的开发,E-mail:zhangxiangyun86@163.com
基金资助:
国家自然科学基金(52061024,52161027);兰州理工大学红柳优秀青年人才支持计划

Influence of heat treatment on corrosion resistance of cold-sprayed Fe-based amorphous coatings

Zhang Xiangyun, Ding Guoqiang, Yuan Zizhou

School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou Gansu 730050, China

Received:2024-10-27 Revised:2025-01-21 Online:2025-03-25 Published:2025-05-14

摘要/Abstract

摘要： 采用冷喷涂的方法在ZK60A镁合金表面成功制备了Fe基非晶涂层Fe₇₈Si₉B₁₃,并对其进行低于晶化温度(494 ℃)的不同温度(300、350、400和450 ℃)保温30 min的热处理,利用维氏显微硬度计、电化学工作站、扫描电镜等对涂层的硬度、耐腐蚀性及其机理进行了研究。结果表明,Fe₇₈Si₉B₁₃涂层结构致密,孔隙率为2.73%,非晶率为92.6%,维氏硬度(836.2 HV0.2)远高于镁合金(68 HV0.2),在SBF溶液中涂层的腐蚀速率(0.55 mm/a)明显优于ZK60A镁合金(9.15 mm/a)。涂层热处理后,随热处理温度提高,耐蚀性先增加再降低。350 ℃热处理涂层的耐蚀性最优,自腐蚀电位为－0.684 V,腐蚀速率0.26 mm/a。在SBF中浸泡30 d后涂层表面的Ca与P元素比值非常接近羟基磷酸钙中的比值,具有一定的生物活性。

关键词: 冷喷涂, Fe基非晶涂层, 热处理, 耐腐蚀性, ZK60A镁合金

Abstract: The Fe-based amorphous coating, Fe₇₈Si₉B₁₃, was successfully prepared on the surface of ZK60A magnesium alloy using the cold spray method. The coating was then heat-treated below its crystallization temperature (494 ℃) at different temperatures (300, 350, 400 and 450 ℃) for 30 min. The hardness, corrosion resistance and corresponding mechanisms of the coatings was investigated by using Vickers microhardness testing, electrochemical workstation and scanning electron microscope(SEM).The results show that the Fe₇₈Si₉B₁₃ coating has a dense structure, with a porosity of 2.73% and an amorphous fraction of 92.6%. The Vickers hardness of 836.2 HV0.2 is much higher than that of the magnesium alloy (68 HV0.2). In the SBF solution, the corrosion rate of the coating (0.55 mm/a) is significantly better than that of the ZK60A magnesium alloy (9.15 mm/a). After heat treatment, the corrosion resistance of the coating first increases and then decreases with the increase of heat treatment temperature. The coating treated at 350 ℃ has the best corrosion resistance, with self-corrosion potential of －0.684 V and corrosion rate of 0.26 mm/a. After soaking in SBF for 30 days, the ratio of Ca to P elements on the surface of the coating is very close to that in hydroxyapatite, indicating a certain biological activity.

Key words: cold spraying, Fe-based amorphous coating, heat treatment, corrosion resistance, ZK60A magnesium alloy

中图分类号:

TG178

张香云, 丁国强, 袁子洲. 热处理对冷喷涂铁基非晶涂层耐腐蚀性能的影响[J]. 金属热处理, 2025, 50(3): 270-276.

Zhang Xiangyun, Ding Guoqiang, Yuan Zizhou. Influence of heat treatment on corrosion resistance of cold-sprayed Fe-based amorphous coatings[J]. Heat Treatment of Metals, 2025, 50(3): 270-276.

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热处理对冷喷涂铁基非晶涂层耐腐蚀性能的影响

Influence of heat treatment on corrosion resistance of cold-sprayed Fe-based amorphous coatings

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